diff --git a/wicked_pdf.gemspec b/wicked_pdf.gemspec
index a0cb3257..a42fb1bf 100644
--- a/wicked_pdf.gemspec
+++ b/wicked_pdf.gemspec
@@ -31,6 +31,7 @@ DESC
 
   spec.add_dependency 'activesupport'
 
+  spec.add_development_dependency 'bootsnap'
   spec.add_development_dependency 'bundler'
   spec.add_development_dependency 'mocha', '= 1.3'
   spec.add_development_dependency 'rails'